Also most DoT and HoT abilities dont say how they were nerfed or buffed, just that Stats were rebalanced and due to that, dmg or healin was buffed or nerfed.

For all we know, they made it require more INT to pull off DoTs of the same damage as now, so people with their current INT levels will get a decrease in damage because they don't have a massive amount int. Same thing for Healing. Chances are they did something with the stat coefficients that requires them to lower the base healing, because, maybe, with our current willpower amounts, we would heal for insane amounts with the new stat coefficients.

We have to wait till the PTS server goes up to truely know if it is as we fear, or the other way around.